Overflow box

[Soud3665]

Hi, so I have this 160 gallon tank. I bought it as a freshwater tank and I'm currently moving to saltwater, I want to add a sump. It seems like the best way to do that is a hang on overflow box, but I've also heard it can be a problem if the siphon breaks. I don't want to drill a hole in the tank, and I don't really want to use canister filters, so what would be the best way to do this?

Thank you

 

[T-J]

I mean, you kinda painted yourself into a corner by saying you don't want to drill the tank.
So, your only true solution is to do a hang on overflow box.

 

[CoralClasher]

I run a hang on overflow box and I have the return pump sitting high in the sump so if the siphon breaks not much will overflow the tank. Two years no siphon break.

 

[SahnCH]

Hey, I was in the exact same situation as you, used a hang on overflow box and I'm absolutely happy with it.
Very silent, and I feel safe with it.

 

[Snoopy 67]

I have a great one for sale but shipping would be expensive. Where are you?

 

[KStatefan]

Look at a lifereef

 

[Projects with Sam]

I ran a few King of DIY PVC overflows for 4 years without ever an issue.

 

[ScionFRSguy]

That's a big tank, you're going to have to put in a lot of work to get it going so I would think about it a little longer before you get things started. The last thing you want to do is put in sooo much work to then finding yourself wanting to upgrade. You might end up wanting to set up another tank with dimensions that you actually want with a built in overflow. If you're not happy with the dimensions, I would resell it.